# Webhook errors

The following table specifies the recommended action for each Smartsheet-specific error code.
Use this information to implement error handling logic according to the following guidelines:

* If the error code indicates a permanent error condition, do not retry the request.
* If the error code indicates a problem that can be fixed, do not retry the request until the problem has been fixed.
* If the error code indicates a problem that could be overcome by retrying the request after a period of time, retry the request using exponential backoff.


| HTTP status code | Smartsheet errorCode | Smartsheet message | Recommended Action |
|  --- | --- | --- | --- |
| 400 | 1151 | Scope '{0}', object id {1} was not found. | Do not retry without fixing the problem. |
| 400 | 1152 | Only URLs with a protocol of 'https' are supported for attribute '{0}'. | Do not retry without fixing the problem. |
| 403 | 1153 | This webhook cannot be enabled because access was revoked for the application that created it. | `Do not retry.` |
| 403 | 1154 | Please contact Support in order to enable this webhook. | `Do not retry.` |